JPS6030922B2 - How to deal with excess optical fiber connection length - Google Patents
How to deal with excess optical fiber connection lengthInfo
- Publication number
- JPS6030922B2 JPS6030922B2 JP403581A JP403581A JPS6030922B2 JP S6030922 B2 JPS6030922 B2 JP S6030922B2 JP 403581 A JP403581 A JP 403581A JP 403581 A JP403581 A JP 403581A JP S6030922 B2 JPS6030922 B2 JP S6030922B2
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- cylindrical bobbin
- length
- extra length
- length processing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
- G02B6/444—Systems or boxes with surplus lengths
- G02B6/4441—Boxes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Description
【発明の詳細な説明】
本発明は光フアィバ心線接続泉長処理（以下、単に余長
処理という）を効率よく行い、余長処理部および光ケー
ブル接続部の小型化を図った余長処理方法と、この余長
処理方法に用いる余長処理シートに関するものである。[Detailed Description of the Invention] The present invention provides a surplus length processing method that efficiently performs optical fiber connection spring length processing (hereinafter simply referred to as surplus length processing) and miniaturizes the surplus length processing section and the optical cable connection section. The present invention relates to a surplus length processing sheet used in this surplus length processing method.
光ケーブル接続する際には、光フアィバ心線の接続する
際に生じる光フアィバ心線の余長を効率よく処理するこ
とが必要である。光フアィバ心線の接続において、現状
では専用の装置が必要であり、装置に引き出すための心
線長と、接続の失敗、再接続等を考慮して片側８０肌程
度の余長をもたせている。光フアィバ心線は急厳に曲げ
ると光損失が増加してしまうので、ある曲率以上で余長
処理を行う必要があるが、この曲率を大きくすることは
、余長処理部ひいては光ケーブル接続部が大型化してし
まうので、一定の曲率で、しかも小形に余長処理する方
法が望まれる。When connecting optical fibers, it is necessary to efficiently handle the extra length of the optical fibers that occurs when the optical fibers are connected. Currently, special equipment is required to connect optical fibers, and the length of the fibers to be drawn out to the equipment and an extra length of approximately 80 skins on each side are provided to account for connection failures, reconnections, etc. . If the optical fiber core wire is bent too sharply, the optical loss will increase, so it is necessary to process the excess length above a certain curvature. Since this results in an increase in size, a method of processing the extra length to maintain a constant curvature and make it compact is desired.
さらに、光ケーブルは数１００の光ファィバ心線を収容
しているので、余長処理作業時および障害等での解体時
の作業性が良いことが必要である。Furthermore, since an optical cable accommodates several hundred optical fibers, it is necessary to have good workability when processing excess length and when dismantling due to obstacles.
これらの条件を満足するものとして、従来開発された数
１００ケーブル用の余長処理方法は、第１図に示すよう
に円筒形ボビン１の中央部に光フアィバ心線接続部２を
固定し、余長を含む心線３を半ひねりして円筒形ボビン
１の上に巻き付けて余長処理を行っていた。この方法で
は光ファィバの曲げ半径はほとんど円筒形ボビン１の径
によって決まってしまい、この径は実際には８０〜１胸
ｈｍぐとなって、大型化する欠点があった。通常、円筒
形ボビンの径は光ケーブルの心数に無関係に決められる
ので、小心数の光ケーブルに対しては、光ケーブルの紬
径という特質に対して、余長処理部の大型化は顕著にな
っていた。In order to satisfy these conditions, the conventionally developed surplus length processing method for several hundred cables fixes the optical fiber connecting part 2 to the center of the cylindrical bobbin 1 as shown in FIG. The remaining length was processed by half-twisting the core wire 3 including the extra length and winding it around the cylindrical bobbin 1. In this method, the bending radius of the optical fiber is almost determined by the diameter of the cylindrical bobbin 1, and this diameter is actually 80 to 1 mm, which has the disadvantage of increasing the size. Normally, the diameter of the cylindrical bobbin is determined without regard to the number of fibers in the optical cable, so for optical cables with a small number of fibers, the extra length processing section becomes significantly larger compared to the optical cable's pongee diameter. Ta.
本発明はこれらの欠点を除去するため、余長を大幅に短
尺化して、余長と接続部を一緒に巻き込むシートを用い
ることによって、余長処理を行うようにしたものであり
、余長を短くした際の余長処理部の小型化と処理作業の
効率化を目指したものである。第２図は本発明の一実施
例図であった、２４０の光ケーブルに適用した例を示す
。In order to eliminate these drawbacks, the present invention significantly shortens the extra length and uses a sheet that wraps the extra length and the connection part together to process the extra length. The aim is to downsize the extra length processing unit when shortening the length and to improve the efficiency of processing work. FIG. 2 is an embodiment of the present invention, and shows an example in which the present invention is applied to a 240 optical cable.
４は円筒形ボビン、５は余長処理シ川ト、６は円筒形ボ
ビンの心線ガイド、７は余長処理シート固定用テープ、
８は光ケーブルである。4 is a cylindrical bobbin, 5 is an extra length processing sheet, 6 is a core wire guide of the cylindrical bobbin, 7 is a tape for fixing the extra length processing sheet,
8 is an optical cable.
第２図ａは側面図、第２図ｂは光ケーブルを省いた第２
図ａの断面図である。余長３を処理するには、１枚の余
長処理シート５の上に教本の光フアィバ心線接続部２を
まとめて（第２図では１ユニット６本分を収納している
が、多心ケーブル、たとえば４８０ケーブルの際には２
ユニット１２本分を入れることが有用である。Figure 2a is a side view, Figure 2b is a second view without the optical cable.
Figure a is a cross-sectional view of figure a; To process the extra length 3, put together the optical fiber connectors 2 in the textbook on one extra length processing sheet 5 (in Fig. 2, 6 fibers are stored in one unit, but it is possible to 2 for core cables, for example 480 cables.
It is useful to include 12 units.
）固定する。固定方法は粘着テープを用いてもよいし、
余長処理シート５に光フアィバ心線接続部固定用の加工
をしたり、部品を取り付けることにより行う。光ケーブ
ル８側の余長３は、円筒形ボビンの心線ガイド６を通し
、多数本の余長３の不揃いは、余長処理シート６の上で
吸収する。前述の作業を全心線について行い、あとは円
筒形ボビン４の上に巻き付けることにより余長処理は完
了する。第３図〜第６図は余長処理シートの実施例を示
す。) to be fixed. For fixing, adhesive tape may be used,
This is done by processing the extra length processing sheet 5 to fix the optical fiber connection portion or attaching parts. The extra length 3 on the side of the optical cable 8 is passed through a core wire guide 6 of a cylindrical bobbin, and irregularities in the large number of extra lengths 3 are absorbed on the extra length processing sheet 6. The above-mentioned work is performed on all the core wires, and the remaining length processing is completed by winding the wires onto the cylindrical bobbin 4. 3 to 6 show examples of extra length processing sheets.
第３図は糸長処理シート５自体に心線ガイド６′を取り
付けた例を示し、この場合には円筒形ボビンには円筒形
ボビンの心線ガイドが不要となり、円筒形ボビンの構造
が簡単になる。第４図は心線ガイド６′の一実施例を示
し、′○線を保持するとともに収納し易いように弾性を
もつ材料で構成する。Fig. 3 shows an example in which a cord guide 6' is attached to the yarn length processing sheet 5 itself. In this case, the cylindrical bobbin does not require a cord guide for the cylindrical bobbin, and the structure of the cylindrical bobbin is simplified. become. FIG. 4 shows an embodiment of the wire guide 6', which is made of an elastic material to hold the wire and to facilitate storage.
第３図におけるこの心線ガイド６′の接続部は、両面接
着テープを用いて糸長処理シート５に固定しているが、
固定用の部品をシートに取り付けることも考えられる。
第５図ａ，ｂは固定部品の一実施例を示し、接続部固定
部品９の中に光フアィバ心線接続部２を収納して強度的
に弱い光フアィバ心線接続部２と光フアィバ心線３の結
合部に急激な曲がりが生じないように溝の中で保護する
構造になっている。The connecting portion of the fiber guide 6' in FIG. 3 is fixed to the yarn length processing sheet 5 using double-sided adhesive tape.
It is also conceivable to attach fixing parts to the seat.
FIGS. 5a and 5b show an embodiment of the fixing part, in which the optical fiber connecting part 2 is housed in the connecting part fixing part 9, and the optical fiber connecting part 2, which is weak in strength, is connected to the optical fiber core. The connecting portion of the wire 3 is protected within the groove to prevent sudden bending.
光フアイバ心線接続部２の固定には接続部固定部品９を
弾性体で作成して弾性力で保持する等、種種の方法が可
能である。また接続部固定部品９はあらかじめ粘着剤１
０によって余長処理シート５に接着させておくが、粘着
剤１０に両面接着テープ等を用いれば、光フアィバ心線
接続部２を収納した後に、余長処理シート５に取り付け
ることもできる。第６図は余長処理シート５′に切り込
み１１を入れた一実施例を示し、余長処理時に心線余長
３をシート５′に固定するので、作業が容易になる。Various methods are possible for fixing the optical fiber connection part 2, such as making the connection part fixing part 9 from an elastic body and holding it with elastic force. In addition, the connection part fixing part 9 is attached with adhesive 1 in advance.
0, but if a double-sided adhesive tape or the like is used as the adhesive 10, it is also possible to attach the optical fiber connector 2 to the surplus length processing sheet 5 after storing it. FIG. 6 shows an embodiment in which a cut 11 is made in the extra length processing sheet 5', and since the extra length 3 of the core wire is fixed to the sheet 5' during extra length processing, the work is facilitated.
第７図には、前述の余長処理を単純化したモデルを示し
ており、以下、このモデルに従って説明をする。FIG. 7 shows a simplified model of the above-mentioned surplus length processing, and the following explanation will be based on this model.
第７図に示すように、接続余長をｘ、ボビンの直径を公
、光フアィバ心線接続部の長さをｙ、余長処理部片側の
長さをＺとして、余長処理した光フアイバ心線はつる巻
き状になり、そのときの曲率半径Ｒは次のように与えら
れる。〜／ ‐薄宏 ・Ｒ：ｒ ｌ＋泰平夜
第８図はこの関係をグラフにしたもので、第８図ａおよ
び第８図ｂは、それぞれ余長処理部片側の長さ夕が１０
弧および２０肌の場合を示す。As shown in Fig. 7, the extra length of the optical fiber processed is as follows: The core wire has a spiral shape, and the radius of curvature R at that time is given as follows. ~/ - Usuhiro ・R:r l+Taiheiya Figure 8 is a graph of this relationship, and Figures 8a and 8b respectively show that the length of one side of the extra length processing section is 10
The case of arc and 20 skins is shown.
光フアィバの曲げ損失が生じるのは、実験からマルチモ
ードフアイバの場合、およそ曲率４仇舷以下であるとい
う結果が得られている。また最近は接続装置の小型化が
進み装置へ引き込む余長は非常に短尺化されつつある。
この際の最低限必要な余長は、接続の失敗、再接続等に
よるものを含めて１５〜２びス確保すれば充分である。
従って第８図ｂから、そ：２０伽の場合には、ボビン半
径を３物奴程度にしても、光ファィバ心線に曲げ損失が
生じない４Ｗ吻以上の曲率となり、第８図ａから〆＝１
０弧の場合でも若干の損失増加を許容すれば、ボビン径
も同様にできることがわかる。これは従来の糸長処理方
法が余長ｘ＝８０肌、ボビン半径４０豚、そ＝舷かで損
失増加が０．１過程度生じていたことを考えると、余長
処理部小型化が充分達成されていることが明らかである
。また教本の余長をまとめてシートに収容し、全心線を
一括処理するので、作業性、解体性が良い。Experiments have shown that bending loss in optical fibers occurs when the curvature of multimode fibers is approximately 4 degrees or less. In addition, recently, connecting devices have become smaller and the extra length that can be drawn into the device is becoming much shorter.
In this case, it is sufficient to secure a minimum surplus length of 15 to 2 spaces, including the length due to connection failure, reconnection, etc.
Therefore, from Fig. 8b, if the diameter is 20, even if the bobbin radius is set to about 3mm, the curvature will be more than 4W, which does not cause bending loss in the optical fiber core, and from Fig. 8a, =1
It can be seen that even in the case of 0 arc, the bobbin diameter can be changed in the same way if a slight increase in loss is allowed. This is because the conventional yarn length processing method had an increase in loss of 0.1 degree when the extra length x = 80 skin, the bobbin radius was 40, and the side was 0.1 degrees. It is clear that this has been achieved. In addition, the extra length of the textbook is stored in a sheet and all core wires are processed at once, making it easy to work and dismantle.
なお円筒形ボビンの構造が簡単になるので、経済的であ
る。Furthermore, since the structure of the cylindrical bobbin is simple, it is economical.
以上説明したように、本発明による余長処理方法によれ
ば、余長処理部のづ・型化を図ることができ、処理部の
構造も簡単にできるので経済的である。As explained above, according to the surplus length processing method according to the present invention, the surplus length processing section can be made into a smaller shape, and the structure of the processing section can be simplified, which is economical.
また本発明の余長処理シートを用いることにより、作業
性の向上を図ることができる。さらに本発明で示した余
長処理部の設計を行うことにより、糸長処理部の最適化
、小型化を図ることができる利点がある。Further, by using the extra length processing sheet of the present invention, workability can be improved. Furthermore, by designing the surplus length processing section as shown in the present invention, there is an advantage that the yarn length processing section can be optimized and downsized.
第１図は従来の余長処理方法の説明図、第２図は本発明
による余長処理方法の一実施例、第３図は本発明による
余長処理シートの一実施例図、第４図は余長処理シート
に取り付ける心線ガイドの一実施例図、第５図は余長処
理シートに取り付ける接続部固定部品の斜視図、第６図
は本発明による切り込みを持つ余長処理シートの一実施
例図、第７図は余長処理モデル図、第８図は余長処理時
の光フアィバ曲率計算結果を示す図である。
１・…・・円筒形ボビン（従来型）、２・・・…光フア
ィバ心線接続部、３……光フアィバ心線（余長）、４・
・・・・・円筒形ボビン、５・…・・金長処理シート、
６・・・・・・円筒形ボビンの心線ガイド、６′・・・
…心線ガイド、７・・・・・・余長処理シート固定用テ
ープ、８・・・・・・光ケーブル、９・・・・・・接続
部固定部品、１０・・・・・・粘着剤、１１・・・・・
・切り込み。
第１図第２図
第３図
第４図
第５図
第６図
第７図
第８図
第８図FIG. 1 is an explanatory diagram of a conventional surplus length processing method, FIG. 2 is an embodiment of the surplus length processing method according to the present invention, FIG. 3 is an illustration of an embodiment of the surplus length processing sheet according to the present invention, and FIG. 4 5 is a perspective view of a connecting part fixing part to be attached to an extra length processing sheet, and FIG. 6 is an example of an extra length processing sheet having a notch according to the present invention. FIG. 7 is a model diagram of the surplus length processing, and FIG. 8 is a diagram showing the calculation result of the optical fiber curvature during the surplus length processing. 1...Cylindrical bobbin (conventional type), 2...Optical fiber connection section, 3...Optical fiber (extra length), 4...
...Cylindrical bobbin, 5...Kincho processing sheet,
6...Cylindrical bobbin core wire guide, 6'...
... Core wire guide, 7 ... Extra length processing sheet fixing tape, 8 ... Optical cable, 9 ... Connection fixing parts, 10 ... Adhesive , 11...
・Notch. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 8
Claims (1)
長処理シートを前記円筒形ボビンの円周方向に配置し、
前記シート上にそれぞれ複数の光フアイバ心線接続部を
固定して光フアイバ心線接続余長部を前記シートと一緒
に円筒形ボビンに一括して巻き付けることを特徴とする
光フアイバ心線接続余長の処理方法。 ２ 円筒形ボビンと、これに一辺を固定した複数枚の余
長処理シートを前記円筒形ボビンの円周方向に配置し、
前記シート上にそれぞれ複数の光フアイバ心線接続部を
固定して光フアイバ心線接続余長部を前記シートと一緒
に円筒形ボビンに一括して巻き付け、光フアイバ心線の
接続余長をｘ、光フアイバ心線接続部の長さをｙ、前記
円筒形ボビンの半径をｒ、円筒形ボビンの長さを２ｌ＋
ｙとして、ｒ√（１＋（ｌ＾２）／（Ｘ＾２＋２ｌｘ）
）の値が光フアイバ曲げ損失が生じる曲率と同等ないし
、それ以上の値になるボビン形状と接続余長をもたせる
ことを特徴とする光フアイバ心線接続余長の処理方法。[Scope of Claims] 1. A cylindrical bobbin, and a plurality of extra length processing sheets with one side fixed to the cylindrical bobbin, arranged in the circumferential direction of the cylindrical bobbin,
A plurality of optical fiber cable connection parts are each fixed on the sheet, and the optical fiber cable connection surplus part is wound together with the sheet around a cylindrical bobbin. How to handle length. 2. Arranging a cylindrical bobbin and a plurality of extra length processing sheets with one side fixed to the cylindrical bobbin in the circumferential direction of the cylindrical bobbin,
A plurality of optical fiber cable connection parts are fixed on each of the sheets, and the excess optical fiber connection parts are collectively wound around a cylindrical bobbin together with the sheet, so that the connection excess length of the optical fiber cables is x. , the length of the optical fiber connection part is y, the radius of the cylindrical bobbin is r, and the length of the cylindrical bobbin is 2l+
As y, r√(1+(l^2)/(X^2+2lx)
) is equal to or greater than the curvature at which optical fiber bending loss occurs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP403581A JPS6030922B2 (en) | 1981-01-14 | 1981-01-14 | How to deal with excess optical fiber connection length |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP403581A JPS6030922B2 (en) | 1981-01-14 | 1981-01-14 | How to deal with excess optical fiber connection length |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57118209A JPS57118209A (en) | 1982-07-23 |
| JPS6030922B2 true JPS6030922B2 (en) | 1985-07-19 |
Family
ID=11573700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP403581A Expired JPS6030922B2 (en) | 1981-01-14 | 1981-01-14 | How to deal with excess optical fiber connection length |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6030922B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6063805U (en) * | 1983-10-07 | 1985-05-04 | 昭和電線電纜株式会社 | Fiber wire extra length storage body for optical fiber cable connection part |
| JPS60149010A (en) * | 1984-01-17 | 1985-08-06 | Fujitsu Ltd | Storing device of excessive length part for connecting optical fiber |
| JPS60191005U (en) * | 1984-05-29 | 1985-12-18 | 三菱電線工業株式会社 | Connection structure of composite optical cable |
| JPS6147907A (en) * | 1984-08-16 | 1986-03-08 | Furukawa Electric Co Ltd:The | Optical fiber surplus length holding sheet |
| JPS61140304U (en) * | 1985-02-21 | 1986-08-30 | ||
| JPH0516562Y2 (en) * | 1988-03-16 | 1993-04-30 | ||
| US5997186A (en) * | 1998-05-13 | 1999-12-07 | Huynh; Van L. | Hybrid cable splice closure and related methods |
| CA3083126A1 (en) | 2017-11-29 | 2019-06-06 | Prysmian S.P.A. | Power cable joint comprising optical fibers and organizer accommodating them |
-
1981
- 1981-01-14 JP JP403581A patent/JPS6030922B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57118209A (en) | 1982-07-23 |
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